Key Speakers At Diggers & Dealers Mining Forum

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A bar of gold and a sample of quartz with a gold vein are arranged for a photograph at the Doray Minerals Ltd. booth during the Diggers and Dealers mining forum in Kalgoorlie, Australia, on Tuesday, Aug. 6, 2013. The Diggers and Dealers mining forum runs from Aug. 5-7. Photographer: Carla Gottgens/Bloomberg via Getty Images

A bar of gold and a sample of quartz with a gold vein are arranged for a photograph at the Doray Minerals Ltd. booth during the Diggers and Dealers mining forum in Kalgoorlie, Australia, on Tuesday, Aug. 6, 2013. The Diggers and Dealers mining forum runs from Aug. 5-7. Photographer: Carla Gottgens/Bloomberg via Getty Images

Key Speakers At Diggers & Dealers Mining Forum

Bloomberg

A bar of gold and a sample of quartz with a gold vein are arranged for a photograph at the Doray Minerals Ltd. booth during the Diggers and Dealers mining forum in Kalgoorlie, Australia, on Tuesday, Aug. 6, 2013. The Diggers and Dealers mining forum runs from Aug. 5-7. Photographer: Carla Gottgens/Bloomberg via Getty Images

A bar of gold and a sample of quartz with a gold vein are arranged for a photograph at the Doray Minerals Ltd. booth during the Diggers and Dealers mining forum in Kalgoorlie, Australia, on Tuesday, Aug. 6, 2013. The Diggers and Dealers mining forum runs from Aug. 5-7. Photographer: Carla Gottgens/Bloomberg via Getty Images

Key Speakers At Diggers & Dealers Mining Forum

Bloomberg

A bar of gold and a sample of quartz with a gold vein are arranged for a photograph at the Doray Minerals Ltd. booth during the Diggers and Dealers mining forum in Kalgoorlie, Australia, on Tuesday, Aug. 6, 2013. The Diggers and Dealers mining forum runs from Aug. 5-7. Photographer: Carla Gottgens/Bloomberg via Getty Images

A bar of gold and a sample of quartz with a gold vein are arranged for a photograph at the Doray Minerals Ltd. booth during the Diggers and Dealers mining forum in Kalgoorlie, Australia, on Tuesday, Aug. 6, 2013. The Diggers and Dealers mining forum runs from Aug. 5-7. Photographer: Carla Gottgens/Bloomberg via Getty Images

Key Speakers At Diggers & Dealers Mining Forum

Bloomberg

A nugget of gold is arranged for a photograph at the Phoenix Gold Ltd. booth during the Diggers and Dealers mining forum in Kalgoorlie, Australia, on Tuesday, Aug. 6, 2013. The Diggers and Dealers mining forum runs from Aug. 5-7. Photographer: Carla Gottgens/Bloomberg via Getty Images

A nugget of gold is arranged for a photograph at the Phoenix Gold Ltd. booth during the Diggers and Dealers mining forum in Kalgoorlie, Australia, on Tuesday, Aug. 6, 2013. The Diggers and Dealers mining forum runs from Aug. 5-7. Photographer: Carla Gottgens/Bloomberg via Getty Images